Step 5: Timing Belt Pulley Brackets

This is most of the fabrication for the project, and not too hard.  This approach is a big improvement on the plastic ones from the previous project, and with the T-Slot, are very nicely adjustable.

Cut the channel aluminum into six 2.25" lengths, then drill two 1/2" holes in the sides (1/2" from the end and the open side)  and two 7/32" holes for the #10 bolts in the bottom of each (1/4" and 3/4" from the end and centered in the channel). Use a step drill for the 1/2" holes - it's much easier than trying to use a 1/2" bit.

You can see how we assembled the parts for these in the pictures.



















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